Editor's note: This article was originally published on February 1, 2008, and has been updated. It was excerpted from our Coin-Operated Laundry start-up guide, available from Entrepreneur Bookstore.

The UK has released the final coin of the Dinosauria set, featuring the Megalosaurus, Iguanodon, and Hylaeosaurus. I take a look at the coolest sets of coins in the world, including some that join to ...